GeForce 7900 GT and GeForce 8400 GS PCI Rev. 2 - video card comparison
GeForce 7900 GT
GeForce 8400 GS PCI Rev. 2
Architecture
Curie (2003−2013)
Tesla 2.0 (2007−2013)
GPU code name
G71
GT218
Market segment
Desktop
Desktop
Release date
March 2006
April 2007
Interface
PCIe 1.0 x16
PCI
Supplementary power connectors
1x 6-pin
None
Core clock speed
450 MHz
520 MHz
Manufacturing process technology
90 nm
40 nm
Number of transistors
278 million
260 million
Pipelines / CUDA cores
-
16
Power consumption (TDP)
48 Watt
40 Watt
Texture fill rate
10.80
4.160
Memory type
GDDR3
DDR3
Maximum RAM amount
256 MB
512 MB
Memory bus width
256 Bit
64 Bit
Memory clock speed
1320 MHz
1000 MBps
Memory bandwidth
42.24 GB/s
8 GB/s
Display Connectors
2x DVI, 1x S-Video
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
9.0c (9_3)
11.1 (10_1)
CUDA
-
1.2
OpenCL
N/A
1.1
OpenGL
2.1
3.3
Shader Model
3.0
4.1
Vulkan
N/A
N/A